<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <button onclick='myfunction()'>点我</button>
    <script>
    //测试setInterval
        function myfunction(){
            setInterval(alertFunc,1000)
        }

        function alertFunc(){
            console.log('hello');
        }
    </script>
</body>
</html>